Electric pulsating apparatus



Aug. 6, 1935.

ELECTRIC PULSATING APPARATUS Ficgl.

c. G. SUITS 2,010,614

Filed Dec. 23, 1931 I I? 44 A? JATl/RA8LE Fig.2.

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lnventorz. Chauncey G. Suits,

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Patented Aug. 6, 1935 I UNITED STATES PATENT OFFICE 2,010,614 ELECTRIC PULSATING APPARATUS Chauncey G. Sulta'Schenectady, N. Y., assignor to General Electric Company, a corporation of New York Application December 23, 1931, Serial No. 582,802

8 Claims. (Cl. 177-346) My invention relates to electric apparatus for source of alternating current as the circuits the intermittent operation of each of a plurality l and 2. of actuated devices, such for example as electric Under suitable conditions of voltage and frelamps, and it has for its object the provision of quency of the alternating current source 5, which 5 improved means for this purpose which is simple for example may be a 60 cycle 110 volt source, 5

and entirely electrical in operation and which e alternating Current in a of the two automatically controls the relative times of opll s l a d 2 w uc s y rise a d fall in a eration of the devices. pulsating manner and with a frequency which is In accordance with my invention 1 provide a. materially less than that of the frequency of the plu ality of non-linear resonant pulsating ciralternating current supply. When the current in cuits adapted to be energized from the same circuit example, is small, the inductance source of alternating current, each including a the reactor the Capacitance capacitor load device such as an electric lamp a d b th and the resistance of the load device ll bear such having approximately the same pulsation period, a relation to one another that the circuit becomes d 1 provide means cooperating t these resonant. The current therefore increases in 15 device it, such for example as a tungsten filacuits which automatically regulates the relative Value but Such increase in accordance with the times of t pulsations th characteristic of saturable core reactors causes My be better understood from 8, decreaSe in the inductance Of the reactor 8 t0,

the yellowing description taken in connection. such an extent that the circuit is thereby detuned. 0 with the accompanying drawing, and its scope mce a condition of resonance no longer exists will be pointed out n the appended claims the current reduces to its original value. As 2. Referring to the drawing Fig 1 is a circuit result of this change in value of the alternating diagram illustrating one embodiment of my current of circuit I, the load device or lamp ll vention; Figs 2 and 3 illustrate two forms of is successively illuminated and extinguished. reactor which may be usedm that embodiment. Using a 60 cycle alternating current supply the In Fig 1 of the drawing which is a circuit pulsation frequencies obtained with this circuit diagram illustrating an embodiment of my inven- {nay range for gi t second tion, there are two similar non-linear resonant agfi'gfi g gii' gi gg gg gg-gi s; E g

80 5: 2:22? fgi fi fggg fi gi g ggga i 2: degree of saturation of. the reactors. In order connecied to an alternating current source shown that the pulsations in the two circuits l and 2 for example at 5 The alternating current in shall be coordinated or bear some definite time each of these two circuits successively increases $112 g gg igg gfs i fg g fi :2

and decreases as a result of the combination of '6 illuminated alternat e1 0 a y, I have provided the the electric apparatus employed in each circuit transformer 20, preferably having a 1:1 ratio, although such apparatus does not include any with one winding 2| connected across one load mving parts' Circuit includes the alternating device II and the other winding 22 reversely concurrent winding I of the saturable core reactor 8 meted across the other had device '5 AS so having the saturating wlhdmg the capacitor connected, when lamp II is illuminated thereby l0, and the load device H, such for example energizing winding 2| of the transrormer'windas a tungsten filament mhahdesceht lamp- Such ing 22 thereof which is reversely connected to circuit has been descnbed and claimed in circuit 2 supplies a voltage to that circuit which Pateht 1,921,737, Aug-i 1933- Circuit 2 prevents it from becoming resonant at the same which as stated before is similar to circuit 6 time as circuit I. Thus the two circuits l and 2 45 contains the a te n current Wmding 11 Of which have the same or approximately the same I the saturable core reactor I: having the satupulsation period are t or coupled t the by rating Winding the capacitor l and the lead the transformer 20 so that the times of maximum current therein and consequently the times of ment incandescent lamp. Any suitable sou ce of illumination of the lamps H and it occur alterdirect current may be employed for exciting the nately. While I prefer to effect the coupling of saturating windings 9 and m. In the present the two circuits l and 2 by the use of the transcase, however, I have shown these windings supformer 20 in order to secure a desired time relaplied with direct current obtained from the full tion of the pulsations in the two circuits, it will wave rectifier l8 which is connected to the same be observed that the rectifier l3, being common to 55 the saturating windings 9 and M of the reactors of the two circuits, constitutes in itself a form of coupling between those circuits. Both the transformer 20 and the rectifier l8 are entirely electrical in their operation since there are no mechanically moving parts involved in their operation.

For the sake of simplicity in Fig. 1 of the drawing, I have shown the saturable core reactors 8 and i3 in a purely diagrammatic manner. Their actual construction may be as shown for example in Fig. 2 where the core 24 has four legs, the inner two of which carry the coils 25 and 26 wound in opposite directions and connected in parallel in one of the two alternating current circuits and which legs also carry the single coil 27 comprising the saturating winding. A reactor of this type is disclosed in the Alexanderson Patent 1,328,610 of Jan. 20, 1920. If desired, the

reactors 8 and i3 may each be in the form of two transformers, each having its own magnetic circuit, such a form of reactor being shown in Fig. 3. These transformers respectively have cores 32 and 33, saturating windings 34 and 35 shown'connected in series, and alternating current windings 36 and 37 shown connected in parallel. By reversing either the alternating current windings or the saturating windings of each pair of transformers no alternating current is induced in the direct current saturating circuit.

I have chosen the particular embodiment described above as illustrative of my invention and it will be apparent that various other modifications may be made without departing from the spirit and scope of my invention which modifications I aim to cover by the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. In combination, an alternating current supply circuit, a plurality of circuits connected therewith each containing a load device and means for causing the alternating current therein to pulsate and a transformer having its windings for causing the alternating current therein to pulsate and a transformer having its windings connected respectively across the load devices of said circuits for causing the pulsations to occur alternately in the circuits.

3. In combination, an alternating current supply circuit, a plurality ofbranch circuits connected therewith each comprising a saturable core reactor, a capacitor and a lamp arranged in series whereby the illumination of said lamps pulsates at a frequency less than the frequency of said current and means interconnecting said branch circuits for controlling the relative times of occurrence of the illumination pulsations.

4. In combintion, an alternating current supply circuit, a plurality of branch circuitsconnected therewith each comprising a saturable core reactor, a capacitor and a lamp arranged in series whereby the illumination of said lamps pulsates at a frequency less than the frequency of said current and a transformer having its windings connected respectively across said lamps. for

controlling the relative times of occurrence of the illumination pulsations.

5. In combination, an alternating current supply circuit, a plurality of branch circuits connected-therewith each comprising a saturable core reactor having a main winding, a capacitor and a lamp arranged in series, each reactor having a saturating winding, rectifier connected to supply rectified current from said supply to said saturating windings and a transformer having its windings connected each across one of said lamps.

6. In combination, a plurality of circuits arranged to be supplied in parallel from a source of alternating current, said circuits being nonlinear resonant pulsation circuits in which the pulsation frequency is the same or approximately the same and is less than the frequency of the alternating current and means interconnecting said circuits for controlling the relative times of occurrence of the pulsations in the circuits.

7. In combination, a plurality of non-linear resonant pulsation circuits arranged to be supplied in parallel from a source of alternatingcurrent, the frequency of pulsation in said circuits being less than the alternating current frequency, and a transformer having windings connected each to be energized in response to the current in one of said circuits for controlling the relative times of occurrence of said pulsations.

8. In combination, an alternating current supply circuit, a plurality of branch circuits connected therewith eachcomprising a saturable core reactor, a capacitor and a load device arranged in series whereby the alternating current in each branch circuit pulsates at a frequency less than the alternating frequency and means interconnecting said branch circuits to control the relative times of occurrence of the pulsations therein.

CHAUNCEY G. SUITS. 

